A high spatial resolution Stokes polarimeter for motional Stark effect imaging

Journal Article · Sat Jun 15 00:00:00 EDT 2013 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4811738· OSTI ID:22118649

Thorman, Alex; Michael, Clive; Howard, John ^[1]

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1. Plasma Research Laboratory, Research School of Physics and Engineering, Australian National University, Canberra ACT 0200 (Australia)

We describe an enhanced temporally switched interfero-polarimeter that has been successfully deployed for high spatial resolution motional Stark effect imaging on the KSTAR superconducting tokamak. The system utilizes dual switching ferroelectric liquid crystal waveplates to image the full Stokes vector of elliptically polarized and Doppler-shifted Stark-Zeeman Balmer-alpha emission from high energy neutral beams injected into the magnetized plasma. We describe the optical system and compare its performance against a Mueller matrix model that takes account of non-ideal performance of the switching ferro-electric liquid crystal waveplates and other polarizing components.

• OSTI ID: 22118649
• Journal Information: Review of Scientific Instruments, Vol. 84, Issue 6; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAMS
COMPARATIVE EVALUATIONS
DOPPLER EFFECT
EMISSION
FERROELECTRIC MATERIALS
HEATING
IMAGES
LIQUID CRYSTALS
OPTICAL SYSTEMS
PERFORMANCE
PLASMA BEAM INJECTION
PLASMA DIAGNOSTICS
POLARIMETERS
SPATIAL RESOLUTION
STARK EFFECT
SWITCHES
TOKAMAK DEVICES
ZEEMAN EFFECT